En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Pollenless Cedar Elms for Georgetown, Texas

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
3 ratings

Tuesday - September 28, 2010

From: Georgetown, TX
Region: Southwest
Topic: Trees
Title: Pollenless Cedar Elms for Georgetown, Texas
Answered by: Marilyn Kircus

QUESTION:

I am considering planting the Cedar Elm tree at my home in Georgetown, Texas. I was under the impression that only the female of the species produces the irritating pollen. Is this true?

ANSWER:

No, pollen is a guy thing.  Pollen contains the male gametes and is analogous to sperm in animals.   Females produce the irritating things known as kids. (For plants, the strategy is to produce them as seeds and not have to incubate them internally for nine months.)  Plants can be him (male) or her (female) or them (both male and female)."Them" kinds of plants can be further divided into those who have both male and female flowers and those who have flowers that contain both male and female parts.  The latter are called bisexual, hermaphroditic or perfect flowers. When flowers of both sexes are on the same plant, it is called monoecious. When the sexes are on two different plants, the species is described as dioecious.

Ulmus crassifolia (Cedar elms) are wonderful shade trees.  They are recommended as a good substitute for oaks since they don’t get oak wilt. I love their yellow fall color. They are used by lots of different wildlife. Their flowers are perfect and are wind pollinated.  They bloom in late summer and fall - usually August to October and their pollen does cause allergies in some people.  Here is more information on them.

So in addition to having perfect flowers, I think it is a pretty perfect tree.

I'm wondering if maybe you are thinking about the pollen problems with Juniperus ashei (Ashe juniper), a.k.a. cedar. These trees ARE dioecious and the cedar pollen is profuse and will travel long distances.  And of course, there are lots of them. This is the pollen that causes the most allergy trouble in central Texas. But it's the guys plants causing the problem.  The girls have the pretty berries.

 

 

More Trees Questions

Slow development in Shumard Oak from Porter TX
April 02, 2013 - We had two Shumard Oaks Planted in Sept of last year (2012). About a month later, they started browning and dropping their leaves (no color change). Now I noticed on one of the trees the buds have sta...
view the full question and answer

Plants for soil with basalt outcroppings in Idaho
March 30, 2008 - We have basalt (lava) outcropping in part of our back yard and know we'll have to search for pockets of soil in which to plant. Any suggestions about what trees or shrubs would have a chance in thes...
view the full question and answer

Removal of burned tree stump from Weir TX
September 24, 2012 - Hello, I am the community manager for Country Glen, LLC In Weir, Texas 5 miles north east of Georgetown Texas. Simple question I need to remove a large Arizona Ash that was burned buy fire I need th...
view the full question and answer

Need to find an alternative to Bradford Pear in the Woodlands, TX
September 18, 2011 - Hello! I am trying to find an alternative tree to a Bradford Pear. I love the seasonal change in these and ordered one, but after the many negative reviews I've read (smell, weakness in branches, mes...
view the full question and answer

Changing colors on Mexican Plum trees from Bellaire TX
June 20, 2013 - The leaves on my Mexican Plum tree have recently started turning yellow/brown and the veins in leaves are red. Is this a watering issue or disease issue? Mites are on the leaves. This has been a ra...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center